20554220320 has 48 divisors (see below), whose sum is σ = 48585608568. Its totient is φ = 8217241600.

The previous prime is 20554220317. The next prime is 20554220321. The reversal of 20554220320 is 2302245502.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11007367056 + 9546853264 = 104916^2 + 97708^2 .

It is not an unprimeable number, because it can be changed into a prime (20554220321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 270372 + ... + 337948.

Almost surely, 2^20554220320 is an apocalyptic number.

20554220320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20554220320 is an abundant number, since it is smaller than the sum of its proper divisors (28031388248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20554220320 is a wasteful number, since it uses less digits than its factorization.

20554220320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69493 (or 69485 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

Adding to 20554220320 its reverse (2302245502), we get a palindrome (22856465822).

The spelling of 20554220320 in words is "twenty billion, five hundred fifty-four million, two hundred twenty thousand, three hundred twenty".